Pipe-threading tool.



B. BORDEN.

PIPE THREADING TOOL. APPLICATION IILED SEPT. 30, 1910.

1,029,968, Patented June 18, 1912.

2 SHEETS-SHEET l.

COLUMBIA PLANOGRAPH COHWASHINGTON, D. c.

B. BURDEN.

PIPE THREADING TOOL. APPLIGATION FILED SEPT. 30, 1910.

Patented June 18, 1912.

2 SHEETS-SHEET Z.

attomev BRADFORD BORDEN, OF TORONTO, ONTARIO, CANADA.

PIPE-THREADING TOOL.

Specification of Letters Patent.

Patented June 18, 1912.

Application filed SeptemberBO, 1910. Serial No. 584,736.

To all whom it may concern:

Be it known that I, BRADFORD BORDEN, a resident of Toronto, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Pipe-Threading Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of die stocks or pipe threading tools for cutting tapered threads and capable of being used without the employment of a work holder clamped to the pipe, or other object, and in respect to which the chaser-carrier has a rotary and longitudinal movement.

A tool of the character outlined is disclosed in application for patent filed by me September 23, 1908, Serial No. 454,383.

The present invention also relates to that class of die stocks wherein the chasers are capable of being adjusted to accommodate pipes of different sizes without the employment of a second plate cooperating with the chaserengaging plate, which second plate engages with means which automatically controls the movement of the chaser-engaging plate and the chasers independently of their rotation with the chaser-carrier;

A tool of this character is disclosed in an application for patent filed by me May 5, 1910, Serial No. 559,444.

The primary object of the present invention is to provide, in a pipe threading tool having the general characteristics above outlined, means whereby the chaser-engaging or cam plate may be adjusted, to adapt the chasers to pipes of different sizes, with out the necessity of disengaging the cam plate from the member or means which controls the independent movement of such cam plate, during the threading operation.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings, Figure l is an end elevation. Fig. 2 is a side elevation. Fig. 3 is a view at right angles to Fig. 2. Fig. 4 is a plan view of the postcarrying member. Fig. 5 is a side view thereof. Fig. 6 is a view of the two posts and their connecting member. Fig. 7 is a face view of the lug-carrying post. Fig. 8 shows a slight modification.

Referring to the drawings, 1 designates the chaser-carrier, which is shown in the form of a circular housing having a series of radial guideways wherein are mounted chasers 2. At opposite sides of the chasercarrier are the two handle sockets 3, wherein the handles by which the tool is rotated are designed to be secured. These sockets are connected by curved webs 4 to the chaser-carrier, and between the latter and the socket webs are two arcual slots or openings 5.

6 designates the chaser-engaging plate, commonly termed cam plate, which is fitted over the face of the chaser-carrier, and on its inner side has eccentrically-arranged chaser-engaging means, preferably in the form of a series of cam slots 7 which take in lugs projecting from the chasers.

8 is a post with which the cam plate is designed to have engagement in such manner that the rotation of such plate will be controlled by the post, and in the present instance I have shown the latter as having a diagonally-arranged lug'9 for taking in a notch or cut outin the periphery of the cam plate. This post is extended through one of the arcual slots 5, and in'the other arcual slot is a second post 10, which latter has no direct connection with the cam plate. These two posts at their outer ends are mounted on and carried by a cross member 12, which extends transversely over the face of the tool, perpendicularly to its axis. In the present instance I have shown this cross member as having a central annular portion 13 wherein a pipe engaging stop 14 is cletachably held by bolts 15. As pointed out in my before noted applications, the relative longitudinal movement between the chaser-carrier and the posts is effected by the engagement between the end of the pipe and the stop 14, such stop while allowing the posts to partake of the rotary motion of the tool preventing them from moving longitudinally with the chaser-carrier as it travels over the pipe, and in consequence the engagement between the cam plate and the post 8 will control the rotation of the former independently of its rotation with the chaser-carrier, and hence the gradual recession 'of the chasers.

It is necessary that some means be employed to insure the rotation of the posts with the chaser-carrier. For this purpose I provide an adjuster which is shown in the form of a ring 1.5 which encircles the chasercarrier, and is provided with two forwardly projecting tubular sockets It) which accommodate the posts 8 and 10. One of these sockets 16 is shown. as having a laterally extending flange 17 which projects over the face of one of the webs l forming the c011- nection between the chaser-carrier and the handle sockets. Through an opening in this flange I pass a lgcking screw 18 for locking the post-carrying ring to the chaser-carrier, but it is to be understood that other and different means may be employed for locking the post-carrying ring. According to the means shown the screw 18 may be caused to enter any one of a series oi? threaded openings according to the size of the pipe to be threaded. Changing the position of the post-carrier relatively to the chaser-carrier changes the position of the ehasers and the cam-plate. I preferably make the opening in the flange 17 oblong, as shown at 20, Figs. 1 and 4:, so as to provide for under or over cutting from standard.

In operation the screw 18 first removed to permit the axial turning of the post-carrying ring and cam plate to adjust the chasers to the pipe to be threaded. The screw is then returned to lock the post-carrying ring to the chaser-carrier. The tool is turned axially in a manner well known, and as the threading operation progresses the independent rotation of the cam plate is controlled by post 8. such post, as well as the cross member and post 10 being prevented from partaking of the longitudinal movement of the chaser-carrier by reason of the engagement of stop 14: with the end of the pipe.

At 21 I have conventionally indicated a pipe centering device which is depended upon solely for the purpose of alining the tool relatively to the pipe but it is not to be fixedly secured thereto as in the case of a work holder.

In Fig. 8 I have shown a slight modification. It will be noted that the slots 5 are not truly arcual, and therefore in order to secure the necessary range of adjustment, the cam plate (3 is provided with a plurality of recesses with which the diagonally-arranged lug on the post may engage. quick change of adj ustment may be efiected by simply pulling outwardly on the cross member so as to disengage the lug-carrying post from the cam plate to permit the latter to be turned axially to adjust the chasers.

I claim as my invention.

1. In a pipe threading tool, the combination with a rotatable and longitudinally movable chaser-carrier, a series of radially arranged chasers, and a chaser engaging plate rotatable with, and movable relatively to, the chaser-carrier, of a post engaging with said plate for controlling the relative movement thereof independently of its rotation with the chaser-carrier, said post being rotatable with said chaser-carrier but not partaking of its longitudinal movement, means for causing said post to re volve with the chaser-carrier, and means for detachably connecting the last mentioned means to the chaser-carrier.

2. In a pipe threading tool, the combination with a rotatable and longitudinally movable chaser-carrier, a series of radially arranged chasers, and a chaser engaging plate rota-table with, and also relatively to, the chaser-carrier, of a post engaging with said plate for controlling the rotation thereof independently of its rotation with the chaser-carrier, means carried by said post for engaging the pipe to be threaded to hold said post from partaking of the longitudinal movement of the chaser-carrier, means for causing said post to revolve with the chaser-carrier, and means for detachably connecting the last mentioned means to the chaser-carrier.

3. In combination with a rotatable and longitudinally movable chaser-carrier, a series of radially arranged Chasers, and a cam plate mounted on said chaser-carrier for engaging the chasers, a post engaging said cam plate to control its axial turning independently of its rotation with the chasercarrier, said post being rotatable with said chaser-carrier but not partaking of its longitudinal movement, an adjuster engaging the post for changing the posit-ion thereof and of the cam plate concentrically to the carrier, and means for detachably locking the adjuster to the chaser-carrier.

4:. In combination with a rotatable and longitudinally movable chaser-carrier, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the Chasers, a post engaging said cam plate to control its axial turning independently of its rotation with the chasercarrier, an adjuster engaging the post for changing the position thereof and of the cam plate concentrically to the carrier, means for detachably locking the adjuster to the chaser-carrier, and means connected to the post for preventing it from partaking ot the longitudinal movement of the chasercarrier.

5. In combination with a rotatable and longitudinally movable chaser-carrier having a slot, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the chasers, a post engaging said cam plate to control its axial turning independently of its rotation with the carrier, said post being extended through said slot, an adjuster carried by the chaser-carrier for controlling .the position of said post and the cam plate concentrically to the chaser-carrier, and means for preventing the post from partaking of the longitudinal movement of said chaser-can Her.

6. In combination with a rotatable and 1011- gitudinally movable chaser-carrier having a slot a series of radially arranged chasers, and a cam plate mounted on said chasercarrier for engaging the chasers a post en gaging said cam plate to control its axial turning independently of its rotation with the carrier, said post being extended through said slot, an adjuster carried by the chasercarrier for controlling the position of said post and the cam plateconcentrically to the chaser-carrier, and means to which said post is secured for holding it from partaking ot' the longitudinal movement of said chasercarrier.

7. In combination with a rotatable and longitudinally movable chaser-carrier having a slot, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the chasers a post engaging said cam plate to control its axial turning independently of its rotation with the carrier said post being extended through said slot, an adjuster carried by the chaser-carrier for controlling the position of said post and the cam plate concentrically to the chaser-carrier, and means to which said post is secured for engaging the object being threaded to prevent the post partaking of the longitudinal movement of said chaser-carrier.

8. In combination with a rotatable and longitudinally movable chaser-carrier having a slot, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the chasers, a post engaging said cam plate to control its axial turning independently of its rotation with the carrier, said post being extended through said slot, an adjuster carried by the chaser-carrier for controlling the position of said-post and the cam plat-e concentrically to the chaser-carrier, a member extending perpendicularly to the axis of the chaser-carrier and to which said post is secured, and an element carried by said member for engaging the object being threaded to prevent the post from partaking of the longitudinal movement of said chaser-carrier. I

9. In combination with a rotatable and longitudinally movable chaser-carrier having oppositely disposed slot-s, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the chaser-s two posts extended through said slots, one of said posts engaging said cam plate to control its axial turning in dependently of its rotation with the carrier, a member extending perpendicularly to the axis of the chaser-carrier and to which said posts are secured, an element carried by said member for engaging the object to be threaded to prevent the posts from partaking of the longitudinal movement of the chaser-carrier, and an adjuster carried by the chaser-carrier for controlling the position of said posts and the cam plate concentrically to the chaser-carrier.

10. In combination with a rotatable and longitudinally movable ohasercarrier having oppositely disposed slots, a series of radially arranged chasers, and a cam plate mounted on said chaser-carrier for engaging the chasers, two posts extended through said slots, one of said posts engaging said cam plate to control its axial turning independently of its rotation with the carrier, a member extending perpendicularly to the axis of the chaser-carrier and to which said posts are secured, an element carried by said member for engaging the object to be threaded to prevent the posts from partaking of the longitudinal movement of the chaser-carrier, an adjuster carried by the chasercarrier for controlling the posit-ion of said posts and the cam plate concentrically to the chaser-carrier, and means for holding said adjuster in diiferent positions on the chaser-carrier.

11. In combination with a rotatable and longitudinally movable chaser-carrier having oppositely disposed slots, a series of radially arranged chasers, and a cam plate mounted on said Chaser-carrier for engaging the Chasers, two posts extended through said slots, one of said posts engaging said cam plate tocontrol its axial turning independently of its rotation with the carrier, a member extending perpendicularly to the axis of the chaser-carrier and to which said posts are secured, an element carried by said member for engaging the object to be threaded to prevent the posts from partaking of the longitudinal movement of the chaser-carrier, an annular member mounted on the chasercarrier and having sockets for taking in said posts, and means for holding said annular member in different positions on the chaser-carrier. I

12. In combination with a rotatable and longitudinally movable chaser-carrier having oppositely disposed slots, a series of radially arranged ohasers, and a cam plate mounted on said chaser-carrier for engaging the chasers, two posts extended through said slots, one of said posts engaging said cam plate to control its axial turning independently of its rotation with the carrier, a member extending perpendicularly to the axis of the chaser-carrier and to which said posts are secured, an element carried by said member for engaging the object to be threaded to prevent the posts from partaking of the longitudinal movement of the chaser-carrier, an annular member mounted on the chaser-carrier and having sockets for taking in said posts, and also having a lateral flange formed with an opening, and a lock screw passed through said opening for holding the annular member to the chaser-car- I161.

13. The combination with a chaser-can rier, a series of chasers, and a cam plate, said chaser carrier having oppositely-disposed arcual slots, of two posts passed through said slots, one post engaging said cam plate to control the rotation thereof, a transverse member connecting said posts, a stop carried by said transverse member for engaging the object being threaded to preventthe posts from moving longitudinally with the carrier, an annular member having sockets for said posts, said member having a flange formed with a slot and a lock-screw passed through said slot and designed to engage the chaser-carrier at any one of a series of points.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

BRADFORD BORDEN. Witnesses H. R. SULLIVAN, J. No'ra MCGILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

